Literature
A Crushing Workout Session (Story)
  A lone pony was waiting for a certain "guest" to arrive at the local Wonderbolts Training Room with a surprise "Just think of all the fun we could have! I can hardly contain my excitement!" The one pony, who was named Checkerboard, began thinking of the many fantasies he would have if he ever had a planetary sized pony towering before the marble sized planet "One of Zecora's potions could probably do the trick! It's one of her "experimental" potions though, which are usually off limits.." as Checkerboard was dreaming of all his fantasies his train of thought was suddenly interrupted when somepony came in who looked quite familiar "Rainbow Dash! Down here!!" The large athletic Pegasus was completely unaware of the tiny glasses wearing pony down below as she began to start her daily excercises "Ok, first let's do some squats!" Her loud voice said as Checkerboard was right behind her during this as he got quite the view of her two large buttcheeks coming down "Oh M-My.... they're so h-huge!" Suddenly Checkerboard began feeling his tiny body pinned under Rainbow Dash's big blue cheeks each time she squatted "Mmmph! So soft....yet heavy!" The small pony couldn't help but blush at this feeling as he secretly enjoyed every moment of it. The more Rainbow Dash did her squats, the more she began to work up a sweat as her butt began to get damp "Phew! Already working up a sweat!" Checkerboard's body was also getting damp as Dash's sweaty butt made contact with it "Ah! Sh-she's sweating now!" Several drops of sweat rolled down the large round cheeks of the blue Pegasus as the smell in the air definitely smelled like a very active gym filled with many ponies working out "This...kinda feels nice! Hopefully she doesn't notice and ruin my fun!" This continues for a good couple of minutes until Checkerboard couldn't contain his excitement as he moans in pleasure and wiggles around, getting the attention of Rainbow Dash "Huh? What was that?! Did I sit on something?" Rainbow Dash looked behind her down at her butt to see what appears to be a small spec "Uh, h-hello there! I'm Ch-Checkerboard!" The tiny pony was very nervous as he saw the previously unaware pony now looking down at him "W-What were you doing near by b-butt?!" Rainbow Dash blushes but was obviously weirded out and embarrassed at this whole situation "W-Well you see, I k-kinda wanted to get an up close look at your...b-butt.... cause it was a huge dream of mine to be this c-close to it!" The pony puts her hoof up "Enough! Since you wanna be so close to my butt so badly, you'll become my tiny little workout partner! Whether you like it or not!" Checkerboard's eyes grew wide upon hearing this as this was all that he could've asked for "Omg! You really mean it?! That would be awesome!" A smug smile grew across Rainbow's face "heh, let's see if you can handle it though!" Checkerboard was very worried at what Rainbow Dash could've had planned for him but he just wanted to spend more time with her big butt.  "I sure hope you're prepared for what's coming next little guy!" Rainbow Dash said as the small butt cushion saw the blue Pegasus jump up slightly until their MASSIVE butt landed back down with alot of force that Checkerboard could've sworn he would've been pancaked by now *THOOM!* "Like that? Here's some more!" Dash keeps on repeating the process over and over again, constantly crushing the tiny sized pony beneath her big blue butt *THOOM!* "oof!" *THOOM!* "Mmmph!" *THOOM!* the constant bouncing on the ground caused some things on the walls to jiggle a little as they were close to falling off their hinges "How are you holding up back there? Ready to give up?" Checkerboard simply smiled and blushed with a bruised face "N-Never..." Rainbow Dash chuckled at his response "suit yourself! You're only prolonging the inevitable!" Soon the Pegasus' butt began to grind on the floor as the shrunken pony began to get rolled around under it "Wah! I'm gonna get rolled up into a tortilla under giant blue buttcheeks!" despite getting a bit dizzy at some points, Checkerboard still pretty much enjoyed this feeling whilst being coated in Rainbow Dash's butt sweat as he entire body was damp with it "Hehe, might need a shower after this is over to get all this sweat off!" Checkerboard said with a chuckle as his so called fantasy continued. Unaware to the much smaller pony, Rainbow Dash snuck in some food during his workout as this was making her belly quite active "hehe he definitely isn't prepared for this!" The huge blue butt lifts up high into the air as Checkerboard admired the view until suddenly it came down hard on him, soon trapping him within the bigger and heavier pony's humid crack "uh, R-Rainbow Dash?" This was all new to Checkerboard as he's never been in this specific area of a pony's behind "Oh my...*guuurrrgle*...it's really brewing in there!" The Pegasus rubs her belly as she smirks, knowing that what was about to come next was something that the butt loving pony was not prepared for *pppfffffftttttt!* "Ah...." Muffled screams came from beneath Rainbow's cheeks as Checkerboard struggles to breathe in any fresh air available "Ugh! *Cough* O-Ok! *Cough* this isn't fun anymore! *Cough* I want out! *Cough* Get me outta here!!" The Pegasus laughs triumphantly "hehehehehe! What's the matter specky? Already giving up on our little workout? I'm just getting started!" The foul gassy odor emanating from the pony's crack fills Checkerboard's nostrils as his fantasy now became a nightmare as he began getting grinded beneath the now smellier butt, getting covered in the nasty fart smell. Many minutes passed as Rainbow Dash squats, pounds, and pulverizes the tiny helpless pony under her big heavy butt as her cheeks jiggle each time "Oof! S-So....stinky..." Checkerboard was close to nearly passing out from such a smell as one final ground shaking butt crush lodged the micro sized pony to one of Rainbow Dash's cheeks "hahaha! Looks like I beat you yet again squirt! Forever and always! And don't worry, there's still much more in store for you! Just you wait!" Checkerboard can only groan in defeat as his bruised and battered body was unable to free himself as Rainbow Dash headed off to take a nap for the day, ready to begin much more "Advanced" excercises tomorrow.